NDLI: The influence of 1D, meso- and crystal structures on charge transport and recombination in solid-state dye-sensitized solar cells

Content Provider	Royal Society of Chemistry (RSC)
Author	Palumbiny, Claudia M. Docampo, Pablo Schmidt-Mende, Lukas Sivaram, Varun Ivaturi, Aruna Gunning, Robert Welland, Mark E. Diefenbach, Sandra Kirkpatrick, James Snaith, Henry J. Geaney, Hugh
Copyright Year	2013
Abstract	We have prepared single crystalline SnO2 and ZnO nanowires and polycrystalline TiO2 nanotubes (1D networks) as well as nanoparticle-based films (3D networks) from the same materials to be used as photoanodes for solid-state dye-sensitized solar cells. In general, superior photovoltaic performance can be achieved from devices based on 3-dimensional networks, mostly due to their higher short circuit currents. To further characterize the fabricated devices, the electronic properties of the different networks were measured via the transient photocurrent and photovoltage decay techniques. Nanowire-based devices exhibit extremely high, light independent electron transport rates while recombination dynamics remain unchanged. This indicates, contrary to expectations, a decoupling of transport and recombination dynamics. For typical nanoparticle-based photoanodes, the devices are usually considered electron-limited due to the poor electron transport through nanocrystalline titania networks. In the case of the nanowire-based devices, the system becomes limited by the organic hole transporter used. In the case of polycrystalline TiO2 nanotube-based devices, we observe lower transport rates and higher recombination dynamics than their nanoparticle-based counterparts, suggesting that in order to improve the electron transport properties of solid-state dye-sensitized solar cells, single crystalline structures should be used. These findings should aid future design of photoanodes based on nanowires or porous semiconductors with extended crystallinity to be used in dye-sensitized solar cells.
Starting Page	12088
Ending Page	12095
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	39
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta11855j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Crystallite Three-dimensional space Dye-sensitized solar cell Solar cell Short circuit Photocurrent Carrier generation and recombination
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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